740 Thermocouple Selector Switch
For those customers wishing to be able to purchase a system complete with thermocouple cold junctions and selector switch, Isotech has designed the Model 740 Thermocouple Selector.
It is housed in an attractive case and stands next to the Zeref V enabling 1 of up to 18 thermocouples to be selected.

• Ideal for Laboratory

• Simple to Use

• Less than 1.5µV Switching Errors

The Model 740 Thermocouple Selector Switch acts in conjunction with the Zeref Ice Point Reference Unit to give a complete thermocouple referencing system.
Up to 18 thermocouples can be accommodated on the top of the Selector, by screw terminals, standard or miniature thermocouple sockets, or a combination of all three. The sockets or screw terminals are connected via looms to cold junction probes which fit into a Zeref Type 136.

Any type of thermocouple, or combination of thermocouples, can be referenced if specified at the time of ordering.

From the Zeref, the referenced outputs of the thermocouples return to the Thermocouple Selector and are presented via the highest quality thermocouple switch available to two output terminals which can then be connected to a microvolt measuring device.